UBUNTU-CVE-2018-6794

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    UBUNTU-CVE-2018-6794

    Published: 7 Feb 2018Last Modified: 24 Oct 2025
    Upstream:
    CVE-2018-6794

    Summary:

    Details: Suricata before 4.0.4 is prone to an HTTP detection bypass vulnerability in detect.c and stream-tcp.c. If a malicious server breaks a normal TCP flow and sends data before the 3-way handshake is complete, then the data sent by the malicious server will be accepted by web clients such as a web browser or Linux CLI utilities, but ignored by Suricata IDS signatures. This mostly affects IDS signatures for the HTTP protocol and TCP stream content; signatures for TCP packets will inspect such network traffic as usual.

    References: https://ubuntu.com/security/CVE-2018-6794, https://redmine.openinfosecfoundation.org/issues/2427, https://github.com/OISF/suricata/pull/3202/commits/e1ef57c848bbe4e567d5d4b66d346a742e3f77a1, https://www.cve.org/CVERecord?id=CVE-2018-6794

    Affected packages

    Package

    Name: suricata

    Purl: pkg:deb/ubuntu/[email protected]?arch=source&distro=xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    2.0.8-1build1
    2.0.9-1
    2.0.10-1
    2.0.10-2
    2.0.11-1

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High